linux-kernel - [PATCH] ftrace: Don't try to __ftrace_replace_code on !FTRACE_FL

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Date:	Fri, 13 Mar 2009 17:16:34 +0800
From:	Zhaolei <zhaolei@...fujitsu.com>
To:	"Steven Rostedt ;" <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>
CC:	linux-kernel@...r.kernel.org
Subject: [PATCH] ftrace: Don't try to __ftrace_replace_code on !FTRACE_FL_CONVERTED
 rec

Do __ftrace_replace_code for !FTRACE_FL_CONVERTED rec will always
fail, we should ignore this rec.

Signed-off-by: Zhao Lei <zhaolei@...fujitsu.com>
---
 kernel/trace/ftrace.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 26c45aa..08f4a62 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -532,11 +532,12 @@ static void ftrace_replace_code(int enable)
 
 	do_for_each_ftrace_rec(pg, rec) {
 		/*
-		 * Skip over free records and records that have
-		 * failed.
+		 * Skip over free records, records that have
+		 * failed and not converted.
 		 */
 		if (rec->flags & FTRACE_FL_FREE ||
-		    rec->flags & FTRACE_FL_FAILED)
+		    rec->flags & FTRACE_FL_FAILED ||
+		    rec->flags & FTRACE_FL_CONVERTED)
 			continue;
 
 		/* ignore updates to this record's mcount site */
@@ -548,7 +549,7 @@ static void ftrace_replace_code(int enable)
 		}
 
 		failed = __ftrace_replace_code(rec, enable);
-		if (failed && (rec->flags & FTRACE_FL_CONVERTED)) {
+		if (failed) {
 			rec->flags |= FTRACE_FL_FAILED;
 			if ((system_state == SYSTEM_BOOTING) ||
 			    !core_kernel_text(rec->ip)) {
-- 
1.5.5.3


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